Derivative Instruments (Notional Values) (Details) - SCE	9 Months Ended	12 Months Ended
	Sep. 30, 2022 GWh Bcfe	Dec. 31, 2021 Bcfe GWh
Electricity options, swaps and forwards (GWh)
Derivatives
Notional volumes of derivative instruments	1,038	1,869
Natural gas options, swaps and forwards (Bcf)
Derivatives
Notional volumes of derivative instruments | Bcfe	47	58
Congestion revenue rights (GWh)
Derivatives
Notional volumes of derivative instruments	39,800	33,216